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What is the purpose of “&&” in a shell command?
As far as I know, using & after the command is for running it in the background.
9 Answers
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Difference between “!==” and “==!” [closed]
... ==! in any language so I wondered how the hell this code could even work and did some testing:
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Using an ORM or plain SQL? [closed]
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ORMs have some nice features. They can handle much of the dog-work of copying database columns to object fields. They usually handle converting the language's date and time types to the appropriate database type. They generally handle one-to-many relationships pret...
What is the difference between Serializable and Externalizable in Java?
What is the difference between Serializable and Externalizable in Java?
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MySQL maximum memory usage
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MySQL's maximum memory usage very much depends on hardware, your settings and the database itself.
Hardware
The hardware is the obvious part. The more RAM the merrier, faster disks ftw. Don't believe those monthly or weekly news letters though. MySQL doesn't scale linear - not even on Oracle hard...
Is there a JSON equivalent of XQuery/XPath?
When searching for items in complex JSON arrays and hashes, like:
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Extending from two classes
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You can only Extend a single class. And implement Interfaces from many sources.
Extending multiple classes is not available. The only solution I can think of is not inheriting either class but instead having an internal variable of each class and doing more o...
Postgres and Indexes on Foreign Keys and Primary Keys
Does Postgres automatically put indexes on Foreign Keys and Primary Keys? How can I tell? Is there a command that will return all indexes on a table?
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Android adb “Unable to open sync connection!”
I can run and debug my Android app on my phone just fine, most of the time. Then, seemingly randomly, when I try to run or debug my app from Eclipse, the Console in Eclipse says:
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SQL Server Management Studio alternatives to browse/edit tables and run queries [closed]
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I strongly feel that we can't edit tables and can't run queries with hints using LINQ
– bjan
May 18 '12 at 5:28
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